#ECF359#ECF359

#ECF359 is a very light, vivid yellow. Relative luminance 0.827; OKLCH L 93.1% C 0.172 H 111.8°. Best body text is #000000 at 17.53:1 contrast (WCAG AA passes).

Color values

HEX	#ECF359
RGB	rgb(236, 243, 89)
HSL	hsl(63, 87%, 65%)
HSV	hsv(63, 63%, 95%)
CMYK	cmyk(2.9%, 0%, 63.4%, 4.7%)
CIE-LAB	lab(92.86, -21.07, 70.70)
CIE-LCH	lch(92.86, 73.77, 106.60°)
OKLab	oklab(93.12% -0.064 0.16)
OKLCH	oklch(93.12% 0.172 111.8)
XYZ	xyz(68.4478, 82.6569, 21.7980)
Luminance	0.8266 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF359 #6059F3

analogous

#F3AD59 #ECF359 #9FF359

triadic

#ECF359 #59ECF3 #F359EC

tetradic

#ECF359 #59F3AD #6059F3 #F3599F

square

#ECF359 #59F3AD #6059F3 #F3599F

split-complementary

#ECF359 #599FF3 #AD59F3

monochromatic

#BBC30E #E5EF20 #ECF359 #F3F792 #F9FBCB

Accessibility & contrast

On white

1.20

#ECF359 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.53

#ECF359 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF359

17.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF359	#FFFFFF	#000000	##000000
##ECF359	1.00	1.20	17.53	17.53
#FFFFFF	1.20	1.00	21.00	21.00
#000000	17.53	21.00	1.00	1.00
##000000	17.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE845

Deuteranopia (green-blind)

#FFEC63

Tritanopia (blue-blind)

#FBE5D3

Achromatopsia (no color)

#EAEAEA

Design tokens & code

CSS

--color: #ecf359;
/* rgb */ color: rgb(236, 243, 89);
/* oklch */ color: oklch(93.1% 0.172 111.8);

Tailwind

colors: {
  custom: {
    50: '#f5f68f',
    500: '#ecf359',
    950: '#000000',
  },
}

SCSS

$custom: #ecf359;
$custom-light: #f5f68f;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf359",
  "rgb": {
    "r": 236,
    "g": 243,
    "b": 89
  },
  "hsl": {
    "h": 62.727,
    "s": 86.517,
    "l": 65.098
  },
  "oklch": {
    "l": 0.93122,
    "c": 0.17233,
    "h": 111.8
  },
  "luminance": 0.82655
}

Semantic roles & 50–950 ramp

primary

#ECF359

secondary

#362FC1

accent

#02E30D

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECF359

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →